Eriochrome black T indicator (C.I. 14645), 1% solid

Basic Information

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CAS Number

1787-61-7

Molecular Formula

C20H12N3NaO7S

Molecular Weight

461.4 g/mol

Chemical Classification

Basic Chemical Raw Materials Organic Chemicals Carboxylic Acids

Fine Chemicals Dyes and Pigments Organic Dyes

Fine Chemicals Surfactants Anionic Surfactants

Basic Physical Properties

Melting Point

>360°C

Boiling Point

°Cat760mmHg

Water Solubility

50 g/L (20 ºC)

Flash Point

185 °C

Solubility

50g/l

SMILES

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C1=CC=C2C(=C1)C=CC(=C2O)N=NC3=C4C=CC(=CC4=C(C=C3O)S(=O)(=O)[O-])[N+](=O)[O-].[Na+]

InChI

InChI=1S/C20H13N3O7S.Na/c24-17-10-18(31(28,29)30)15-9-12(23(26)27)6-7-14(15)19(17)22-21-16-8-5-11-3-1-2-4-13(11)20(16)25;/h1-10,24-25H,(H,28,29,30);/q;+1/p-1

InChIKey

AMMWFYKTZVIRFN-UHFFFAOYSA-M

LogP

6.23590

Complexity

782

Safety Information

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GHS Hazard Pictograms

H315

H319

H335

Hazard Statement

H315 Causes skin irritation
Skin corrosion/irritation

H319 Causes serious eye irritation
Serious eye damage/eye irritation

H335 May cause respiratory irritation
Specific target organ toxicity, single exposure; Respiratory tract irritation

Hazard Class

Class 6.1 Class 6.1

Stability

Stable. Incompatible with strong oxidizing agents, strong reducing agents.

Sensitiveness

对湿度敏感

Synonyms & References

English

Chrome Fast Black TS
Salicine Chrome Black HC
Alizarine Chrome Black PT Supra
BC 78924
Pontachrome Black TA
Cromal Deep Black NS
Sodium 3-hydroxy-4-[(1-hydroxy-2-naphthyl)azo]-7-nitronaphthalene-1-sulphonate
NSC 7223
EINECS 217-250-3
Chromogene Black T
Potting Black C
DTXSID4061969
Chrome Black PB
Superchrome Black T
W-109123
Chrome Deep Black T
Chrome Fast Black KIT
C.I. Mordant Black 11 (VAN)
1-(1-Hydroxy-2-naphthylazo)-6-nitro-2-naphthol-4-sulfonic Acid Sodium Salt
MFCD00003935
Chromogene Black ethyl extra
Omega Chrome Black S
Mordant Black 11, ACS reagent grade (Eriochrome Black T)
Mordant Black 11
Lighthouse Chrome Black T
Azochromol Black T
Chromogene Black ET00 special
Chrome Fast Black T
Sunchromine Black ethyl
Alizarine Chrome Black PT
1-Naphthalenesulfonic acid, 3-hydroxy-4-((1-hydroxy-2-naphthalenyl)azo)-7-nitro-, monosodium salt

MDL Number

MFCD00003935

Customs Code

32041900

FAQ

What is Eriochrome black T indicator (CAS: 1787-61-7)?

Eriochrome black T indicator (C.I. 14645), 1% solid, is a metal ion indicator used in analytical chemistry. Its chemical formula is C20H12N2Na2O8S2. It appears as a deep blue powder and is soluble in water, commonly employed for detecting calcium and magnesium ions in solution due to its color change properties in pH ranges 9–11.

What are the main uses of Eriochrome black T indicator (CAS: 1787-61-7)?

Eriochrome black T indicator (CAS: 1787-61-7) is widely used in pharmaceuticals for metal ion analysis, in industrial processes for water hardness testing, and in food safety to detect calcium and magnesium. It also serves as a research tool in analytical chemistry for titration and quality control applications.

Is Eriochrome black T indicator (CAS: 1787-61-7) safe?

Eriochrome black T indicator (CAS: 1787-61-7) is generally considered low toxicity when used properly. However, handling precautions include wearing gloves, safety goggles, and ensuring adequate ventilation. It adheres to safety standards for chemical use in laboratories and industries, but prolonged exposure may cause skin or eye irritation.

How should Eriochrome black T indicator (CAS: 1787-61-7) be stored?

Eriochrome black T indicator (CAS: 1787-61-7) should be stored in a cool, dry place below 25°C, away from light. Maintain humidity levels under 60% and use airtight containers to prevent moisture absorption. Proper storage ensures stability and prevents degradation of its colorimetric properties.